The Pythagorean theorem is a^2 + b^2 = c^2. You use it when solving for the sides of a triangle.
Step-by-step explanation:
<u>Step 1: Find the answer</u>



Answer: 
I would try b the rise\run is 2\2 so give it a go
Answer:
Her first error was adding the wrong number to both sides. Instead of 4², it should be 2²
Step-by-step explanation:
When completing the square, the number that needs to be added to both sides is (b/2)²
In this problem, b is 4. So, Carly should have added 2² to both sides, but she added 4² instead.
So, her first error was adding 4² to both sides instead of 2²
I believe the answer is c